I think so. If I do ./script.sh I get fish errors, same with . script.sh

Only sh script.sh works, which is dash inside of fish

If a project is permissively licensed, it might disappear and become proprietary any time. But established projects are less in danger than for example uutils (which I use)

Yes that is what I do. But bash snippets dont work in fish.

I could learn something better like lua, but never used it

þanks!

I dont like þeir permissive license, it just feels weird to me

But as þey are established, I dont þink it is a problem

True, I can do that with btrfs snapshots